64 results about "Ductor" patented technology

An inking device of a printing press, including an ink ductor roller reciprocating between a receipt position, at which the ink ductor roller contacts an ink fountain roller to receive ink, and a transfer position, at which the ink ductor roller contacts an ink distribution roller or a first intermediate roller located downstream in an ink transfer direction to pass the ink on to the roller, comprises: a pair of split clamping holders supporting the ink ductor roller and supported swingably; and moving means, comprising a shaft, a sleeve, a bearing portion, a worm wheel, a worm shaft, and an operating shaft having a dial-equipped handle, for moving the pair of split clamping holders in the axial direction of the ink ductor roller.

The invention discloses a system for realizing direct stopping of elevator and the implement method thereof, The system comprises a master control board, a frequency converter, an electromotor, an encoder, a flat layer inductive switch, a ductor, a car and a hoistway; the master control board acquires the accurate position of each layer and the absolute location of the car in the hoistway by the signals on the flat layer inductive switch, the doctor and the encoder, and control the start and stop of the frequency converter; the electromotor controlled by the frequency converter drives the elevator car to move up and down; the master control board acquires the object residual distance an the speed of the elevator by the encoder signal, determines the elevator speed curve and the deceleration points, acquires the actual distance to the target layer station by the flat layer inductive switch mounted on the car side wall and the inductors mounted on all the layer positions on the side wall of the hoistway when the elevator is approaching the target layer station, and corrects the speed and acceleration of the elevator thereby to cause the elevator to stop at the target position stably.

In an ink supply amount control method for a printing press, ink is supplied from the gap between a plurality of ink fountain keys and an ink fountain roller to an ink supply path in accordance with rotation of the ink fountain roller. The swing operation of an ink ductor roller is temporarily stopped. When the swing operation should intermittently be stopped, the operation of the ink fountain key or the ink fountain roller is controlled to control the ink supply amount to the ink ductor roller. Ink in a corrected amount is supplied to a printing plate attached to a plate cylinder through the ink supply path by the swing operation of the ink ductor roller. An ink supply amount control apparatus is also disclosed.

A high-temperature superconductor (HTS) coil includes a coil winding with a superconducting material and a coil former for carrying the coil winding. When the high-temperature supercon-ductor (HTS) coil cools down from a room temperature to an operating temperature, the coil winding or the coil former counteract a thermal shrinkage of the coil winding in order to avoid or reduce a longitudinal compression of the superconducting material of the coil winding.

An ink film thickness distribution forming method in an ink supply apparatus including an ink fountain. A plurality of ink fountain keys are arranged in the ink fountain. Ink is supplied to an ink fountain roller in accordance with the opening ratios of the plurality of ink fountain keys. Ink is transferred to an ink ductor roller from the ink fountain roller. Ink from the ink doctor roller is transferred to an ink roller group including at least one ink form roller. A throw-off operation of the ink form roller positioned at an end of the ink roller group is performed after the end of a print job. The ink roller group is divided into a plurality of roller subgroups after the end of the print job. The ink in at least one of roller subgroups is removed. An ink film thickness distribution forming apparatus is also disclosed.

An ink feed control method for a printing press in which ink, supplied to an ink fountain roller from a gap between each ink fountain key and the ink fountain roller by the rotation of the ink fountain roller, is supplied to the printing plate by swing operation of an ink ductor roller, so that a print is eventually made on a print sheet with the ink supplied to the printing plate, the method including the steps of: measuring any one of the density and the ink film thickness of a first printing product made by the printing press; and controlling the number of times of the swing operation of the ink ductor roller relative to the rotation of the printing press in accordance with the value of the measured one of the density and the ink film thickness of the first printing product.

An ink supply amount adjustment method for a printing press includes steps of measuring the density value of each density measurement patch printed in a range corresponding to each ink fountain key on a printed printing sheet, obtaining the opening ratio of each ink fountain key in preliminary ink feeding, based on the difference between the measured density value of a patch and a preset reference density value, and the current opening ratio of each ink fountain key or image data in the range corresponding to each ink fountain key, and performing the ink feed operation of an ink ductor roller while printing is suspended, after setting the opening ratio of each ink fountain key to the obtained opening ratio in preliminary ink feeding. An ink supply amount adjustment apparatus for a printing press is also disclosed.

The invention belongs to the field of plane truss production, and particularly relates to a plane truss production line. The plane truss production line comprises a placing device, a straightening roller pressing device, a waving device, a welding device and a shearing device, wherein the waving device comprises a waving base, a waving drive, a side steel bar guide pipe, a fixed waving device anda movable waving device, and the fixed waving device comprises a first rotating shaft and a first crawler belt, triangular plates are fixed on the outer side of the first crawler belt, and the movablewaving device comprises a sliding guide rail, a sliding base, a second rotary shaft and a second crawler belt, triangular plates are fixed on the outer side of the second crawler belt, and the wavingdrive is connected with the first rotary shaft and the second rotary shaft; the welding device comprises a welding frame and welding heads; the shearing device comprises a shearing base and a cutterframe, and a cutter rotating shaft is arranged on the cutter frame, a cutter connecting part sleeves the cutter rotating shaft, and a shearing cutter is hinged to the lower part of the cutter connecting part. According to the plane truss production line, the steel bar can be processed into the plane truss, the processing process is automatic, the efficiency is high, and the method is suitable forlarge-scale plane truss processing.

In an ink supply amount control method for a printing press, the number of ink fountain keys whose gap amount with respect to an ink fountain roller falls within a predetermined range is counted. On the basis of the count value, the swing operation of an ink ductor roller which is arranged in an ink supply path and swings in synchronism with rotation of the printing press is controlled. Ink is supplied from the gap between the plurality of ink fountain keys and the ink fountain roller to the ink supply path in accordance with rotation of the ink fountain roller at the time of printing. The ink is supplied to a printing plate attached to a plate cylinder through the ink supply path by the swing operation of the ink ductor roller. An ink supply amount control apparatus and a printing press are also disclosed.

An ink film thickness distribution correction method in an ink supply apparatus including an ink fountain storing an ink, a plurality of ink fountain keys, an ink fountain roller to which the ink is supplied from the ink fountain, an ink ductor roller to which the ink is transferred from the ink fountain roller, and an ink roller group including at least one ink form roller to which the ink transferred to the ink ductor roller is supplied. A throw-off operation of the ink form roller positioned at the end of the ink roller group is performed during test printing or final printing. An ink film thickness distribution correction apparatus is also disclosed.

A printing unit includes a press unit having a forme cylinder, a transfer cylinder, an inking unit and, preferably, a damping unit. The inking unit of each press unit applies printing ink to a forme cylinder of the respective press unit in such a way that a ductor roll of an inking unit picks up printing ink kept ready in an ink fountain and applies it to the forme cylinder of the respective press unit by a film roll interacting with the ductor roll, inking unit rolls arranged downstream of the film roll, and at least one ink applicator roll rolling on the forme cylinder. Inking unit rolls driven in rotation and inking unit rolls driven in oscillation are are driven independently from one another on the drive side.

A connecting device for the fluid-tight connection of a first and a second duct provided with a connector having a fixed electrical connection terminal; a mobile electrical connector for establishing an electrical connection with the fixed electrical connection terminal; a control unit suited to check the presence of a connection between the fixed electrical connection terminal and the mobile electrical connector; and an intermediate connecting body interposed in use between the connector and the mobile electrical connector, suited to establish an electrical connection between the fixed electrical connection terminal and the mobile electrical connector and suited to allow the fixed electrical connection terminal and the mobile electrical connector to be coupled to each other, only when there is a fluid-tight joint between the two ducts.

A device for determining the wear of ink fountain films in an ink fountain has at least one ink metering element and a ductor in a printing press. The ink metering element can be moved in the direction of the doctor. A closed position of the ink metering element with an ink fountain film inserted can be determined, and that deviations from the closed position determined are registered by a sensor and the deviations registered can be supplied to a computer as a basis for determining the wear of the ink fountain film.

An inking unit for a rotary printing machine includes an ink fountain, a pivotable ink fountain holder in which the ink fountain is mounted, an ink ductor, and a pivotable ink ductor holder in which the ink ductor is mounted. The ink ductor holder and the ink fountain holder are connected by an operating cylinder so that ductor and the ink fountain can be pivoted jointly to a first position in which ink flows out of the ductor without flowing out of the fountain, and so that the ductor can be pivoted away from the first position to a second position while the ink fountain remains in the first position, thereby creating a gap between the ductor and the ink fountain.